Device for salvaging in the manufacture of rubber thread



Aug. 10, 1954 E. N. BRODEN 2,585,926

DEVICE FOR SALVAGING IN THE MANUFACTURE OF RUBBER THREAD Filed June 2,1951 IN V EN TOR.

EDzW/V IV. ERODE/V Patented Aug. 1o, 1954 a v 2,685,926

DEV'IGE-FQR sawaome-ngzj 'THE. Mamet-gmission stUBBnnmgmtAp E lwingrgden, Assonet, Mass, assignor to The ili'rss e- 1ir9- &.. r bgrQmreem. "9 9.1 eerr ra ie of a 2 rneseta d e hl r endsa e attai e ab thetr i as a ger tu "re a ed d n the t l i ts ilie draw; gs,i ch;

1- i va toprlan riew ef he t lention rel t m to. the .awieesbr .qareeters s 9 m sate A there is shown a conventional curing s art allies;&6 cut 6n the moving s I tion axially of the drum, producing a helicalcut.

The lWQQFQQEQW; i P9 Pi Qm in Width nor are it's edges strictlyrectilinear. For these and other reasons having to do with the severalAlsoisuppo t transie rsof the stock-from -reelto roll andf-rom arrangedT v rlo ll to-reel; there-has in-the past beencons ider- 9,, lit.iatterfiat-etbfi able departure from alignment of the eldg es-c ofhorizontal plates 12, 1-3

-t meyeral-layers of cured' sheeton the utting in their UD13I'1,BQ%$; fe g Since the- -rubber-threadmust be conof the spindle of a supply-roll:1-1 nuns and the knife cuts through several-layers, ealen eredtshefiqltqlmd "al i 'material lying outside the iinnermostpoint "Irimmermechanism iiinghllilfic .ZWQ eate s on the edges of the sheet layersmust be scrapped, knives 2|, 22, one for trimming each edge of at eachend of the sheet material on the drum. the sheet l8. Except for thedriving elements,

Since the material is vulcanized, it can only be the support issymmetrical about the longitudinal re-used in a reclaiming operation.center line of sheet l8 and, therefore, only one I have found that bytrimming the sheet as it side (lower side in Fig. 1) will be described;is fed onto the curing drum, it is wound thereon similar referencenumerals being used for similar with edges exactly aligned, and thiscondition elements on each half of the support. Thus, can be maintainedreasonably well in subsequent 7 channel 2 has bolted to its upper face abracket transfers culminating in the winding of the sheet 23 carrying abolt 24 to which is pivoted an arm on the cutting drum. By this method,the 26 of channel section. Respective arms 26 are amount of scrap fromthe cured sheet on the joined by two channel sections 21, 28. Abackcutting drum is greatly reduced, the saving of ing roller 29 forknives 2|, 22 has a spindle 32 material being efiected at the stagewhere the journaled in arms 26 near the upper ends theretrimmingoperation is performed. Since at this of. Knives 2!, 22 are arranged tocontact roller stage the stock is uncured, the material of the 29 andeach knife is rotatably mounted in a salvaged edges can be returned tothe calenders fork member 30 pivoted on a shaft 3| journaled forre-working. v in and extending between arms 26. The knives It istherefore an object of the invention to are resiliently urged againstroller 29 by means minimize waste of cured material in the drum of atension spring 33 anchored at one end on cutting of rubber-threads.Another object is to an adjustable screw 34 threaded in a bracket trimrubber sheet material intended for drum- 3'! on channel 28 and securedby a lock nut 36, cutting into rubber threads prior to vulcanizathespring being attached at its other end to tion thereof. A further objectis to trim rubber an arm 38 extending from fork 3| and forming sheetmaterial prior todrum curing so that the V a'bell crank therewith.

trimmings may be re-worked into sheet form and Spindle 32 extendsconsiderably outward from the cured sheet may be evenly reeled onto acutchannel 26 (lower end of Fig. 1) and carries ting drum. A'stillfurther object is to provide near its end a rotatable hub 39 havinga'radial I means to accomplish such a trimming operation. arm 4| with astub shaft 42 to which is keyed cutting discs.

3 a drive wheel 43. Also keyed to shaft 42 is a. sprocket 44 engaging achain 46 which drives a sprocket 41 on shaft 32 to drive roller 29.

Drive wheel 43 is adapted to contact the bottom 48 of a channel collar49 peripherally arranged on drum l near one end thereof. The drive wheelis brought into engagement with the channel bottom 48 by swingingassembly 6 on pivots 24 and is resiliently held against the channelbottom by a compression spring acting between a bracket 52 on arm 4| anda bracket 53 on arm 26. A guide rod 54 is located within spring 5|,being attached to bracket 52 and slidable through bracket 53.

Assembly 6 is held in either driving or idle position by means of bars56 secured by set screws to a shaft rotatably mounted in uprightchannels 9, I l, and having slots 51 receiving a bolt 58 carried by arm26 and secured by a wing nut 59.

The sheet I8, as it leaves roll ll, passes over a roller 6| journaled inbracket 62 on uprights 26 and thence under roller 29, from where itpasses to drum I. In passing under roller 29,

the edges of the sheet are trimmed square and parallel by rotary knives2|, 22. In Fig. 1, the

irregularities in the edges of sheet 18 have been exaggerated, toheighten the contrast to the straight edges of the sheet after it passesthe The salvaged material may be collected in any suitable manner, as byreceiving it in a box.

The drive is arranged to give to roller 29 about the same peripheralspeed as drum l and, to this end, bottom 48 of channel 49 is locatedradially of the drum so as to correspond with about the middle layer ofwindings on drum l to provide an average of the surface speed of sheetI8.

While a certain embodiment has been shown and described, the inventionis not limited thereby since changes in the size, shape, character orarrangement, for instance, of the various parts may be resorted towithout departing from the spirit or scope of the appended claims.

What is claimed is:

1. In combination, a curing drum on which a sheet of calendered rubberis adapted to be wound, said drum having a peripheral channel near oneend, a framework adjacent the drum having a roll with axis parallel tothat of said drum, a pair of rotary knives with cutting edges andresilient means urging said knives into contact with said roll, an armcoaxially mounted with said roll for swinging motion, a roller on thedistal end of said arm adapted to contact said peripheral channel onsaid drum, resilient means urging said roller into contact with saiddrum, and drive means between said roll and said roller, said frameworkbeing mounted for swinging motion to and from said drum.

2. In combination, a curing drum on which a sheet of calendered rubberis adapted to be wound, a framework adjacent the drum havin a roll withaxis parallel to that of said drum, a pair of rotary knives with cuttingedges contacting said roll, an arm coaxially mounted with said roll forswinging motion, a roller on the distal end of said arm adapted tocontact said drum, and drive means between said roll and said roller,said framework being mounted for swinging motion to and from said drum.

3. In combination, a curing drum on which a sheet of calendered rubberis adapted to be wound, a framework adjacent the drum having a roll withaxis parallel to that of said drum, a pair of rotary knives with cuttingedges and resilient means urging said knives into contact with saidroll, an arm coaxially mounted with said roll for swinging motion, aroller on the distal end of said arm adapted to contact said drum, anddrive means between said roll and said roller.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 409,408 Lacroix Aug. 20, 1889 1,089,467 Gammeter Mar. 10, 19141,402,160 Gwozdz Jan. 3, 1922 1,419,174 Sherman et a1. June 13, 19221,651,837 Richey Dec. 6, 1927 1,764,665 Wennerberg June 17, 19302,316,283 Piperoux et a1. Apr. 13, 1943

